package com.lefull.lefullbase.base;

import android.app.Activity;
import android.content.Context;
import java.util.Stack;

/**
 * @author minozhang
 * @date 28/5/2018
 * @funcation 管理AppTask工具类
 */
public class AppManager {
    private static Stack<Activity> activityStack;
    private static AppManager mInstance;

    /**
     * 单一实例
     */
    public static AppManager getAppManager() {

        if (mInstance == null) {
            synchronized (AppManager.class) {
                if (mInstance == null) {
                    mInstance = new AppManager();
                }
            }
        }
        return mInstance;
    }

    /**
     * 添加Activity到堆栈
     */
    public void addActivity(Activity activity) {
        if (activityStack == null) {
            activityStack = new Stack<>();
        }
        activityStack.add(activity);
    }

    /**
     * 从堆栈移除该activity
     */
    public void removeActivity(Activity activity) {
        if (activity != null) {
            activityStack.remove(activity);
        }
    }

    /**
     * 获取当前Activity（堆栈中最后一个压入的）
     */
    public Activity currentActivity() {
        if (activityStack == null || activityStack.isEmpty()) {
            return null;
        } else {
            Activity activity = activityStack.lastElement();
            return activity;
        }
    }

    /**
     * 结束当前Activity
     */
    public void finishCurrentActivity() {
        Activity activity = activityStack.lastElement();
        finishActivity(activity);
    }

    /**
     * 结束指定的Activity
     */
    public void finishActivity(Activity activity) {
        if (activity != null && !activity.isFinishing()) {
            activityStack.remove(activity);
            activity.finish();
        }
    }

    /**
     * 结束指定类名的Activity
     */
    public void finishActivity(Class<?> cls) {
        for (Activity activity : activityStack) {
            if (activity.getClass().equals(cls)) {
                finishActivity(activity);
                break;
            }
        }

    }

    /**
     * 结束所有的Activity
     */
    public void finishAllActivity() {
        if (activityStack.size() == 1) {
            return;
        }
        for (int i = 0; i < activityStack.size(); i++) {
            if (null != activityStack.get(i)) {
                finishActivity(activityStack.get(i));
                break;
            }
        }
        activityStack.clear();
    }

    /**
     * @return 获取指定类名的Activity
     */
    public static Activity getActivity(Class<?> cls) {
        if (activityStack != null) {
            for (Activity activity : activityStack) {
                if (activity.getClass().equals(cls)) {
                    return activity;
                }
            }
        }
        return null;
    }

    /**
     * 退出应用程序
     */
    public void AppExit(Context context) {
        try {
            finishAllActivity();
            android.os.Process.killProcess(android.os.Process.myPid());
            System.exit(0);
        } catch (Exception e) {
        }

    }

}
